Extracting apparatus.



1( s, FORETICH I E. L. @Hoon/Is.

yI-IXTRACTINGAPPARATUS.

APPLICATION FILED JUYLY 5v, 1912.

its ceptacle 6 to receive the turpentine, solventl JOSEPH S. 'Foa'ETIoHAND ELIAS L. GRooiyis, or GULFPORT, MISSISSIPPI.

l.'sxriaacrine APPARATUS.

To all 'whom it may concern Be it knownthat we, JOSEPH S. FoRETroH andELIAS L. GRooMs, citizens of the United` States, residing at Gulfport,inthe county of Harrison and State of Mississippi, have invented new anduseful Improvements 1n y. Extracting Apparatus, of which the followingis a specification.

This invention relates to an extractingappai'atus, more especially,designed for extracting turpentine and other essential oils and rosinfrom wood, but adapted also for ratus for rapidly and economicallyextracting substances of the character named, and

which is adapted for the use of a solvent in, connection with heat inthe extracting operation and to enable the solvent to be recovered forrepeated use. v i.

The invention consists of. the'features of,

construction, combination and arrangement of parts hereinafter fullydescribed and claimed, reference 'being had'to the accom- .panyingdrawings', in which- Figure 1 is a diagrammatic side elevation, withparts in Section, of an extracting apparatus constructed in accordancewith our invention. 'F ig. 2 is a top plan view of the same. Fig. 3 is avertical longitudinal section through the extractor or retort on anenlarged scale. Fig. 4 is a vertical transverse section of the same.Fi'g. 5 is an end velevation of the extractor or retort showing theadjacent hinged door in open position,

the solvent spray coil and coacting screen' appearing in transversesection.

In carrying our invention into practice,

.we provide 'an extractor or retort comprising a substantiallycylindrical casing 1 normally open at its opposite ends and adapted tobe hermetically closed by hinged doors 2 and 37 which are mounted toswing in a horizontal plane to .open and closed posi'- tions and to abutwhen closed against suit- ',able packing 4t at the ends of the casing.The bottom of the casing preferably' slopes to a cei'taindegree towardits outletend and is provided at such point with an opening below whichis arranged a chamber 5 for the `collection of the rosin and otherheavier volatile constituents .of the Wood.

Y At the top of the casing is a dome or re- The shaft is hollow andprovided with lat- Speciication of Letters Patent. application fliediuiy', 1912. seriai No. 707,311.

'rosiri and other solid Patented Aug. 3, i915.

Dis-

14 acting as a retarder to the discharge of the vapors, and alsovdisposed in the top of the casing above the screen is a perforated spraypipe or coil 15 for supplying a suitablesolvent to the material undertreatment, which solvent is sprayed lfrom the pipe and through thescreenand is thus properly distributed to all portions of the casing.n Said,coil or pipe 15 is supplied with Solvent through -a pipe 1,6 leadingfrom' an elevated solvent reservoir 17, Whieh'pipe 16 is provided With acontrolling valve 18.

' Arranged within the bottom of the Acasing is a steam heatingpipe orcoil19, which is supplied with steam throughpipes 20, 21 land 22havingcontrolling valves 23, 24` and 25 from a main steam supply pipe 26leading from afboiler or other suitable steam generator 27. A similarheating pipe or coil 28 is arranged in the bottom of the collectionchamber 5 and communicates with the pipe 26 throughI a pipe-29 having acontrolling valve 30. The casing 1 is provided with a liquid gage S1-forindicating the level of the solvent therein, while-the collectionchamber 5 is provided with a pyrometer 32 whereby the internaltemperature may at any time be determined. It will thus be understoodthat the casing and collection chamber may be heated to any desiredtemperature to vdrive 0H the volatile constituents of the wood andvaporize thefsolvent and also to keep the constituents in a liqueiiedstate.`

The casing is provided at opposite sides `eral discharge apertures forthe intr-oclosed' by swing` bolts 42 on the casing adapted forengagement with notches 43 in said doors, and the door 3 is providedwith a bearing 44 for a hollow drive shaft 45 which extendstherethrough. The inner end of this shaft 45is provided with a clutch orcoupling member 46 adapted to engage a coacting clutch or couplingmember 47 on the adjacent end of the shaft 38, whichy clutch members areadapted to be automatically coupled and Vuncoupled by the closing andopening movements of the door 3, whereby the drum may be connected withand disconnected from the drive shaft. rThe drive shaft may be driv'enin *any suitable manner, as by means cfa sprocket wheel 48 n connectedby a chain 49 with a sprocket .wheel 5G on .a main driving shaft 51receiving motion from any suitable source of power. The outer end of thedrive shaft is provided with a coupling 52 for connection with a pipe ortube leading fromany suit able source of supply ofthe solvent agent tobe used, and the engaging surfaces/of the clutch members 46 and 47 areprovided in ,practice with suitable packing to form a tight joint forthe flow of out leakage.

lin practice at least two carriages providedL with rotary drums of thecharacter described are employed, one of which will be the, solventwitharranged within the extractorl casing for the treatment of itscharge while the other Ais being filled with a charge for subsequenttreatment. rlhe carriages are entered into the retort through thedoorway 2 from a' track 53 having a hinged section 54 which may bethrown back to permit the door to be opened and closed. it this pointthe drum may be rfilled with the wood or material from an elevatedhopper 55 supplied with material by a conveyer or elevatorl 56. Afterthe material has been treated within the-extractor, the door 3 isopenedand the carriage run out upon a track 57 having a v` hinged section 58which may be swung back to permit said door to be opened and closed. Therefuse material may then be discharged from the drum through the outletcontrolled by the door 37 into a pin 59, or the carriage may be run intoa bleaching and drying device similar in general construction to thecasing l, where the material` may be niaaoea bleached and dried anprepared for use as .wood pulp forthe manufacture of paper or for otherpurposes.

rihe rosin and other heavier volatile constituents of the wood collectedinthe chamber 5 pass outward through a discharge pipe 60 to a reiiner(not shown) and thence to a still 61, the heating coil 62 of which isconnected with the pipe 26 by a pipe 63 having a controlling valve 64;`in this still the liner or lighter volatile constituents remaining withthe rosin and other heavier products are vaporized and pass through apipe 65 into a tertiary condenser 66. The .pipe 60 is inclosed by asteam `jacket 67 which may receive the waste steam from the coil 28 orbe4 supplied with steam from the pipe 26 by means of a pipe 68 having acontrolling valve Y69, whereby the resin and solid products may be keptheated and prevented from hardening and clogging the pipes while theextractor is in operation or shut down for repairs, so that suchproducts may be treatved and removed at any time. rlChe still 61 isprovided with a. discharge faucet 7 0 'for the discharge of the resininto a suitable receptacle 7l and a drain pipe 72 having a controllingvalve 73 connects with the acket 67 for the discharge of the water ofcondensation therefrom. A pipe 74 having a controlling valve 7communicates with thecollectionchamber 5 so that hot Water may beadmittted intol said chamberto support the body of resin and preventthesamefrom. being discolored bylthe lheat from the coil 28 and jacket 67,

Vlhe condensers 9, l0 and 66are-respectively provided with draw/oft'valves 769 77 and 78 and communicate'.respectively ywith separators 79, 80 and; 8l in which the volatile products or spirits are separatedAfrom the solvent or moisture. rlhe separator 79 communicates through. apipe 82 having a controlling valve 83 with a solvent recovery tank 84connected by a pipe 85l having a controlling valve 86 with thel storagetank 17. A pump 87 is arranged in the pipe 85 and may be'driven by handor steam power for elevating the solvent from the tank 84 to thereservoir 17 for repeated use. Pipes 88 and 89 havi-ng'controllingvalves 90 and 91 connect the separators and 8l with-tanks 82 and 83 inwhich the spirits or volatile products are conducted for subsequent use.-pump 92, supplied with steam through a pipe 93 from the boiler isconnected with the condensers through a conducting pipe 94 and branchpipes95, 96 and 97 having coni trollingvalves 98'therein, for supplyingor 1 circulating the cooling water.

ln operation, the carriage supporting the drum containing the charge ofwood to be treated is run into the casing l and the doors 2 and 3closed, after which steam is admitted through the pipe 20 to the ,coil19 and through the hollowshaft 38 to the drum 36 and the drum slowlyrevolved, whereby the steam is caused to freely yand quickly enetratethe body of material and drive o the spirits or vapors. As soon as thecasing has been heated to the required extent to liberate the spirits,the .valve 11 is opened together with the valve 12 for the flow of thevapors to the condenser 9 and separatori-80, in which the vapors arecondensed and the spirits separated from the water of condensation andfinally discharged into the receptacle 82. After all the spirits'an'd'rosin which can be removed by the steam heat from the wood aredriven off, the valves '23, 11 and 12 are closed and valve 18 opened andthe hydrocarbon or other cold solvent admitted through the spray pipe 15and hollow shaft until the extractor casing is about one-third full,when the valve 18 is closed, whereby-in the continued Arotation of thedrum the solvent will be taken up and washed through the wood, thusextracting the remainder of the spirits and the rosin. The valves 13 and25 are then'opened, by which steam is supplied to the coil 19 to heatthe extractor and vaporize the solvent, which passes with the extractedspirits out through the pipe 8 into the condenser 10, where the volatile.constituents are condensed and pass into the separator 83, from whichthe solvent is dischargedinto the tank 84 and the spirits withdrawn fromthe separator and stored in one of the tanks 82 or 83. During this stageor process of vaporizing the solvent the drum is rotated at high speed,whereby through the centrifugal action set up all of the liquids androsins will be deposited upon the walls of the casing, leaving the woodthoroughly dry and free from4 all of the solvent and extractedsubstances, the rosin discharging into the collecting chamber 5 aspreviously explained. The door 3 is then opened and the carriage run outfor the subsequent bleaching and drying treatment of the refuse wood forthe purpose described or for its discharge into the bin 59 for any otherintended use, after which another filled drum is run into the casing andthe extractin operation above` described repeated. Whi e the solvent isbeing evaporated the hot water is admitted into the chamber 5 throughthe pipe 74, when the rosin is drawn off, separated from the water andrefined and finally separated from the spirits contained therein in thestill 61, the spirits passing through the pipe 65 into the condenser 66,while the rosin is drawn olf thr1ough the faucet 70 into a suitablereceptac e.

It will be seen from the foregoing description that our `linventionprovides for the treatment of 'the wood by heat and a solvent in suchmanner as to insure the rapid and economical extraction of the rosin andall the volatile constituents, the 4thorough separation of the rosin andconstituents 1n a highly ,pure state and the recovery of the duce timeand labor as well as to prevent dis-v coloration of any of the productsfrom excessive heat, the advantages of which will be apparent.Furthermore by the described mode of treating the rosin and otherheavier I products, it will be seen that these substances may be kept ina liquid state for an indefinite period and prevented from becomingchilled and clogging the apparatus, as'at such times when its immediateremoval is not convenient and it is desired or found necessary to shutdown the extractor for cleaning or repairs.

, l/Ve claim 1; An extractor comprising a cylindrical casing, doors forclosing the ends of said casing, horizontal track rails in the casing, acarriage adapted to travel on said track rails, a shaftsupported by thecarriage and havingv passages for the iiow of a solvent therethrough, adrum carried by and in communication with the shaft, a driving shaftjournaled on one of the doors and adapted to be connectedfwith saidhollow shaft, means for heating the casing, and means for collecting andseparating the products.

2. An extractor of the character described comprising an outer vesselhaving a vapor outlet at its top and a rosin outlet at its-bottom, aperforated rotary receptacle disposed longitudinally within and spacedat all sides from said outer vessel, a perforated pipe or tube extendinglongitudinally within the vessel for the injection of an extractingagent throughout the mass of the material contained therein, said pipeor tube forming the supporting axis on which the perforated receptaclerotates, means for heating the interior of the outer vessel, and meansfor rotating said receptacle.

3. An extractor of the character described comprising an outer vessel, adoor for closing the same, means for heating said outer `vessel, trackrails within the outer vessel, a carriage arranged to travel said trackrails, a perforated pipe supported by the carriage, a perforatedreceptacle mounted to rotate upon said perforated pipe as an axis, adrive shaft supported by the door, and means for connecting said shaftwith the perforated pipe when the door is closed.

4. An extractor of the character described including a carriage, aperforated pipe or axle supported by said carriage, a perforated drum orreceptacle carried by said pipe and through which the latter extends anda; guard screen inclosing said hin saidy receptacle. l ,extractorzof thecharacter described y'Cornprisingian outeryessel having a vapor `outlet'at lits top and a rosin outlet at ,its bottonn a heating coil disposedwithin the [bottom ofsaid Vessel, aperforated solvent #injecting tubearranged within the vtop of A said Vessel, a guard screen disposedbeneath Liedes@ means for supplying Water to the chamber I to be heatedto float the body of rosin therein. f

7. An extractor including an extracting Vessel provided with a-vaporoutlet at its top and a rosin outlet at its bottom, a heating coilWithin said vessel, a heating coil within the rosin outlet, a still, apipe leading 'from' the rosin outlet to said still, a jacketsurrounding'said pipe, means for supplying Water to the rosinoutlet tobe heated to float the body of rosin therein, a

steam supply pipe, and Valved connections.

between said steam `supply pipe and the heating coils and jacket.

In testimony whereof We affix our signatures in presence of twowitnesses.'

JOSEPH S. FORETICH.

ELIAS L. GROOMS. Witnesses:

` C. J. CHRISTIANSEN, p

FRANK J. GOUGH.

